利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.027 秒)

    Polyimide processing additives
    1.
    发明授权
    Polyimide processing additives 失效
    聚酰亚胺加工助剂

    公开(公告)号：US5272248A

    公开(公告)日：1993-12-21

    申请号：US892058

    申请日：1992-05-22

    申请人： J. Richard Pratt ,  Terry L. St. Clair ,  Diane M. Stoakley ,  Harold D. Burks

    发明人： J. Richard Pratt ,  Terry L. St. Clair ,  Diane M. Stoakley ,  Harold D. Burks

    IPC分类号： C08G73/10 ,  C08K5/21 ,  C08K5/3415 ,  C08G69/26

    CPC分类号： C08K5/21 ,  C08G73/1067 ,  C08K5/3415

    摘要： A process for preparing polyamides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.

    摘要翻译： 描述了一种制备具有增强的熔体流动性能的聚酰胺的方法。 该方法包括将高分子量聚（酰胺酸）或聚酰亚胺与低分子量酰胺酸添加剂的混合物加入0.05至15重量％的添加剂。 如此获得的聚酰亚胺粉末显示出改进的加工性能，如通过毛细管流变测定法的较低熔体粘度所证明的。 同样，由聚合物与添加剂的混合物制备的薄膜也显示改善的加工性能，并且通过TMA早期开始拉伸。

    Polyimide processing additives
    2.
    发明授权
    Polyimide processing additives 失效
    聚酰亚胺加工助剂

    公开(公告)号：US5116939A

    公开(公告)日：1992-05-26

    申请号：US84064

    申请日：1987-08-11

    申请人： James C. Fletcher ,  J. Richard Pratt ,  Terry L. St. Clair ,  Diane M. Stoakley ,  Harold D. Burks

    发明人： James C. Fletcher ,  J. Richard Pratt ,  Terry L. St. Clair ,  Diane M. Stoakley ,  Harold D. Burks

    IPC分类号： C08G73/10 ,  C08K5/21 ,  C08K5/3415

    CPC分类号： C08K5/21 ,  C08G73/1067 ,  C08K5/3415

    摘要： A process for preparing polyimides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.

    摘要翻译： 描述了制备具有增强的熔体流动性能的聚酰亚胺的方法。 该方法包括将高分子量聚（酰胺酸）或聚酰亚胺与低分子量酰胺酸添加剂的混合物加入0.05至15重量％的添加剂。 如此获得的聚酰亚胺粉末显示出改进的加工性能，如通过毛细管流变测定法的较低熔体粘度所证明的。 同样，由聚合物与添加剂的混合物制备的薄膜也显示改善的加工性能，并且通过TMA早期开始拉伸。

    Poly(carbonate-imide) polymer
    4.
    发明授权
    Poly(carbonate-imide) polymer 失效
    聚（碳酸酯 - 酰亚胺）聚合物

    公开(公告)号：US4713439A

    公开(公告)日：1987-12-15

    申请号：US834978

    申请日：1986-02-27

    申请人： Terry L. St. Clair ,  Shubha Maudgal ,  J. Richard Pratt

    发明人： Terry L. St. Clair ,  Shubha Maudgal ,  J. Richard Pratt

    IPC分类号： C08G69/44 ,  C08G69/26

    CPC分类号： C08G69/44

    摘要： A novel series of polymers and copolymers based on a polyimide backbone with the incorporation of carbonate moieties along the backbone. The process for preparing these polymers and copolymers is also disclosed as is a novel series of dinitrodiphenyl carbonates and diaminodiphenyl carbonates. The novel polymers and copolymers exhibit high temperature capability and because of the carbonate unit, many exhibit a high degree of order and/or crystallinity.

    摘要翻译： 一种基于聚酰亚胺骨架的新型聚合物和共聚物系列，其中沿骨架加入碳酸酯部分。 还公开了制备这些聚合物和共聚物的方法，是一系列新的一系列二硝基二苯基碳酸酯和二氨基二苯基碳酸酯。 新型聚合物和共聚物表现出高温能力，并且由于碳酸酯单元，许多表现出高度的顺序和/或结晶度。

    Aromatic polyimides containing a dimethylsilane-linked dianhydride
    5.
    发明授权
    Aromatic polyimides containing a dimethylsilane-linked dianhydride 失效
    含有二甲基硅烷的二酐的芳族聚酰亚胺

    公开(公告)号：US5093453A

    公开(公告)日：1992-03-03

    申请号：US449210

    申请日：1989-12-12

    申请人： Anne K. St. Clair ,  Terry L. St. Clair ,  J. Richard Pratt

    发明人： Anne K. St. Clair ,  Terry L. St. Clair ,  J. Richard Pratt

    IPC分类号： C08G73/10

    CPC分类号： C08G73/106

    摘要： A high-temperature stable, optically transparent, low dielectric aromatic polyimide is prepared by chemically combining equimolar quantities of an aromatic dianhydride reactant and an aromatic diamine reactant, which are selected so that one reactant contains at least one Si(CH.sub.3).sub.2 group in its molecular structure, and the other reactant contains at least one --CH.sub.3 group in its molecular structure. The reactants are chemically combined in a solvent medium to form a solution of a high molecular weight polyamic acid, which is then converted to the corresponding polyimide.

    摘要翻译： 通过化学组合等摩尔量的芳族二酐反应物和芳族二胺反应物来制备高温稳定的光学透明低介电芳族聚酰亚胺，其选择为使得一种反应物在其中含有至少一个Si（CH 3）2基团 分子结构，另一反应物在其分子结构中含有至少一个-CH 3基团。 将反应物在溶剂介质中化学组合以形成高分子量聚酰胺酸的溶液，然后将其转化为相应的聚酰亚胺。

    Diphenylmethane-containing dianhydride and polyimides prepared therefrom
    8.
    发明授权
    Diphenylmethane-containing dianhydride and polyimides prepared therefrom 失效
    含二苯基甲烷的二酐和由其制备的聚酰亚胺

    公开(公告)号：US5218077A

    公开(公告)日：1993-06-08

    申请号：US750158

    申请日：1991-08-26

    申请人： Anne K. St. Clair ,  Harold G. Boston ,  J. Richard Pratt

    发明人： Anne K. St. Clair ,  Harold G. Boston ,  J. Richard Pratt

    IPC分类号： C08G73/10

    CPC分类号： C08G73/1046 ,  C08G73/1053

    摘要： A high-temperature stable, highly optically transparent-to-colorless, low dielectric linear aromatic polyimide is prepared by reacting an aromatic diamine with 3,3'bis(3,4-dicarboxyphenoxy)diphenylmethane dianhydride in an amide solvent to form a linear aromatic polyamic acid. This polyamic acid is then cyclized to form the corresponding polyimide, which has the following general structural formula: ##STR1## wherein Ar is any aromatic or substituted aromatic group, and n is 10-100.

    摘要翻译： 通过使芳族二胺与3,3'-双（3,4-二羧基苯氧基）二苯基甲烷二酐在酰胺溶剂中反应形成线性芳族化合物来制备高温稳定的高度光学透明的无介电的线性芳族聚酰亚胺 聚酰胺酸。 然后将该聚酰胺酸环化形成相应的聚酰亚胺，其具有以下通式结构式：其中Ar为任何芳族或取代的芳族基团，n为10-100。